What is STL Air Pros The Premier HVAC Company?

The top-rated HVAC company in St Louis for home and business owners, providing expert HVAC diagnostics, maintenance, and new HVAC installation.

Do heat pumps work well in St. Louis winters?

Yes. Modern inverter-driven heat pumps heat efficiently down to well below freezing, and St. Louis rarely stays below that for long. For the coldest stretches, a dual-fuel setup automatically switches to a gas furnace for backup, giving you the efficiency of a heat pump with the reliability of gas heat.

Heat pump vs. furnace — which is better in St. Louis?

It depends on your fuel costs and home. If you have natural gas, a dual-fuel system (heat pump + gas furnace) is often the most efficient overall. If you're on propane or electric heat, a heat pump alone usually cuts your heating bills significantly. We'll run the numbers for your home during a free estimate.

How long do heat pumps last in St. Louis?

A well-maintained heat pump in the St. Louis climate typically lasts 12–15 years. Because it runs in both summer and winter, it accumulates more hours than a furnace or AC alone — so regular maintenance matters more, not less.

Can you convert my AC to a heat pump?

Often, yes — if your indoor coil and electrical service are compatible. A heat pump uses the same indoor components as a central AC but adds a reversing valve and different controls. We'll tell you honestly whether a conversion makes sense or a full replacement is the better value.

Heat Pumps

Heat Pump Repair & Installation in St. Louis

Heat pumps are the most efficient way to heat and cool a St. Louis home — one system that does both. We install, repair, and service air-source heat pumps, dual-fuel, and ductless systems.

Call (314) 328-0008 Free Estimate

Heat pump condenser units installed by STL Air Pros in St. Louis

Heat Pump Installation & Repair in St. Louis

Modern air-source heat pumps are a different animal than the ones from ten years ago — today's inverter-driven units heat efficiently down to single digits and cool as well as any central AC, all from one piece of equipment. For St. Louis homes, a heat pump can cut heating costs significantly compared to an older electric furnace, and a dual-fuel setup pairs a heat pump with a gas furnace for backup when it drops below the heat pump's efficient range. We install and service heat pumps from Carrier, Trane, Lennox, Mitsubishi, Daikin, and LG, and we size every system with a proper load calculation. Whether you need a new heat pump, a defrost-board repair, or a refrigerant recharge, our NATE-certified techs have the training and the diagnostic tools to do it right.

Signs You Need Heat Pumps

If any of these sound familiar, it's time to give us a call.

Heat pump blows cold air in heating mode and won't switch over

Outdoor unit is frozen solid and won't defrost

Auxiliary or emergency heat runs constantly, spiking your electric bill

Reversing valve stuck — only heating or only cooling works

Loud compressor or vibration from the outdoor unit

System short-cycles in extreme temperatures

Older heat pump struggling in St. Louis cold snaps

Considering a switch from electric furnace to a heat pump

What We Handle

Air-source heat pump installation and replacement

Dual-fuel (heat pump + gas furnace) system design

Ductless mini-split heat pump installation

Reversing valve and defrost board repair

Refrigerant leak detection and recharge

Inverter compressor diagnostics

Auxiliary heat and strip heater repair

Heat pump-to-furnace conversion and vice versa

How It Works

Assess your home

We evaluate your insulation, ductwork, and heating load to determine whether a heat pump, dual-fuel, or mini-split is the right fit for your St. Louis home.

Right-sized system

We run a Manual J calculation and recommend a properly sized, high-efficiency heat pump — no oversizing.

Clean installation

We install the indoor and outdoor units, connect and seal the line sets, and vacuum the refrigerant system to manufacturer spec.

Commission & verify

We verify heating and cooling modes, test defrost operation, and confirm the system hits rated efficiency before we leave.

Licensed & Insured NATE-Certified Techs 24/7 Emergency Service Upfront Pricing

Heat Pump Installation & Repair in St. Louis — Common Questions

What St. Louis Customers Say

Real reviews from homeowners across the metro who trusted us with their HVAC.

"Our AC went out on a 97-degree day and STL Air Pros had a tech at our house within two hours. Fixed a blown capacitor on the spot, explained exactly what failed and why, and the price was totally reasonable. Won't call anyone else."

Marcus Thompson

Webster Groves, MO · May 2025

Google

"Replaced our 18-year-old furnace with a new high-efficiency unit. The crew was on time, professional, and cleaned up completely. They also caught a small carbon monoxide issue with the old heat exchanger — probably saved our family from a serious problem."

Diane Reynolds

Kirkwood, MO · March 2025

Google

"I've used three different HVAC companies over the years and STL Air Pros is in a different league. Straight answers, no upselling, competitive pricing. My maintenance plan has caught two small issues before they became expensive repairs."

James Kowalski

Chesterfield, MO · January 2025

Yelp

Heat Pump Installation & Repair Across the St. Louis Metro

Dedicated heat pump installation & repair pages for cities across St. Louis, St. Charles, and Jefferson counties.

St. Louis Chesterfield St. Charles O'Fallon Florissant Kirkwood Ballwin Wentzville

Ready to Schedule Heat Pumps?

Licensed, insured, and ready to help across the St. Louis metro. Call now or request a free estimate online.

314-328-0008 Request an Estimate